.container {
    flex-direction: column;
    justify-content: center;
    align-items: center;
    left: 0px;
    top: 0px;
    width: 100%;
    height: 100%;
}

.eatBtn {
    margin-top: 335px;
    margin-left: 150px;
    width: 350px;
    height: 210px;
    position: absolute;
    opacity: 0; /* 透明度 */

}

.knockOutBtn{
    border-width: 0px;
    margin-top: 180px;
    margin-left: 130px;
    width: 370px;
    height: 10%;
    position: absolute;
    opacity: 0;
}

.canvas{
    width: 640px;
    height: 1024px;
    background-size: cover;
}
